Lembaran formula, langkah kaedah utama untuk setiap topik dan 16 soalan latihan, dengan penyelesaian penuh di bahagian belakang.
Passage: “Sleep helps the body repair muscles, supports memory and helps control appetite. Adults who regularly sleep too little have a higher risk of several health problems.” Which is the best title for the passage?
A report states: “Since the hospital began offering flu vaccines to all staff, staff sick days in winter have fallen by a third. Other hospitals in the region did not see this drop.” Why is the second sentence important?
Pecahan atau nombor bercampur manakah dalam bentuk termudah yang sama dengan perpuluhan 2.35? Klik padanya.
Selesaikan untuk x: 2(x − 7) = x − 20.
Lapisan dinding jantung manakah yang mengandungi otot jantung?
Selepas kecederaan pada epikondil medial siku, seorang pesakit mengalami kebas pada jari kelingking dan kelemahan abduksi jari. Saraf manakah yang terjejas?
Apakah kesan utama aldosteron pada buah pinggang?
Selepas beberapa hari muntah berterusan kandungan perut, gangguan asid–bes manakah yang paling mungkin?
Why can an electron microscope show more detail than a light microscope?
How does the CRISPR-Cas9 gene-editing system find the right place to cut DNA?
Why does oxygen move from the alveoli of the lungs into the blood?
A salt is dissolved in water in an insulated cup, and the water temperature falls from 25 °C to 20 °C. Which statement is correct?
Which sentence punctuates the address correctly?
Which sentence correctly uses the subjunctive mood?
Choose the meaning of the word in bold: “The new barcode system will enhance medication safety.”
Choose the meaning of the word in bold: “The surgeon explained that the tumour was inoperable.”
Jawapan: D · Why Sleep Matters for Health
The passage is about the health benefits of sleep and the risks of too little. The other titles are too narrow or off-topic.
Jawapan: B · It makes a general winter change an unlikely cause.
If sick days had fallen everywhere, a mild winter might explain it. Because other hospitals did not see the drop, the vaccine is a more likely cause.
Jawapan: 2 7/20
Pecahan, perpuluhan dan peratus ialah tiga cara menulis nombor yang sama. Pecahan → perpuluhan: bahagikan pengangka dengan penyebut. Perpuluhan → peratus: darabkan dengan 100 (alihkan titik dua tempat ke kanan). Peratus → perpuluhan: bahagikan dengan 100. Perpuluhan → pecahan: tulis digit di atas 10, 100 atau 1000 (satu sifar bagi setiap tempat perpuluhan) dan permudahkan.
Jawapan: x = −6
Menyelesaikan persamaan: lakukan perkara yang sama pada kedua-dua belah sehingga x berdiri sendiri. Buat asal operasi dalam urutan terbalik: mula-mula buat asal penambahan atau penolakan, kemudian pendaraban atau pembahagian. Hapuskan kurungan dengan sifat kebolehagihan, a(x + b) = ax + ab, dan kumpulkan sebutan x pada satu belah. Semak jawapan dengan menggantikannya semula.
Jawapan: A · Miokardium
Miokardium ialah lapisan tengah yang tebal dan berotot. Endokardium melapisi ruang jantung dan epikardium menyelubungi bahagian luar.
Jawapan: D · Saraf ulnar
Saraf ulnar melalui belakang epikondil medial. Ia membekalkan kebanyakan otot intrinsik tangan, termasuk interosei, dan kulit jari kelingking.
Jawapan: A · Penyerapan semula natrium dan rembesan kalium dalam nefron distal
Aldosteron bertindak pada tubul distal dan duktus pengumpul untuk meningkatkan penyerapan semula Na⁺ dan rembesan K⁺. Air mengikut natrium, menaikkan isi padu darah.
Jawapan: A · Alkalosis metabolik
Muntah membuang HCl, dan rembesan asid perut meninggalkan bikarbonat dalam darah. Kehilangan isi padu dan kalium rendah membantu mengekalkan alkalosis.
Jawapan: D · Electrons have a much shorter wavelength than light
The shorter the wavelength, the higher the resolution. Electron beams have far shorter wavelengths than visible light, so electron microscopes can separate points that are much closer together.
Jawapan: C · A guide RNA pairs with the matching DNA sequence
CRISPR-Cas9 uses a short guide RNA designed to match the target DNA. The guide leads the Cas9 enzyme to that sequence, where it cuts the DNA so that the gene can be changed.
Jawapan: A · The partial pressure of oxygen is higher in the alveoli than in the blood
Each gas diffuses down its own partial pressure gradient. Alveolar air has a higher oxygen partial pressure than blood arriving at the lungs, so O₂ diffuses in, while CO₂ diffuses the other way.
Jawapan: D · Dissolving is endothermic; the dissolving salt took heat from the water
The water (surroundings) lost heat, so the dissolving process (system) absorbed it. A process that takes in heat and cools its surroundings is endothermic.
Jawapan: C · Send the form to 12 Oak Street, Austin, Texas.
In a sentence, commas separate each part of an address: the street, the city and the state. No comma goes between the house number and the street name.
Jawapan: D · If I were you, I would ask the instructor.
For unreal or hypothetical situations, formal English uses “were” for all subjects: If I were you.
Jawapan: D · Improve
To enhance is to improve the quality or value of something.
Jawapan: D · Unable to be treated by surgery
Inoperable means that surgery cannot be used to remove or treat the problem safely.
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