Lembaran formula, langkah kaedah utama untuk setiap topik dan 16 soalan latihan, dengan penyelesaian penuh di bahagian belakang.
“Of all the jobs on the farm, Leo liked feeding the calves best. He even woke up early on weekends to feed them.” Which detail supports the idea that Leo enjoys feeding the calves?
“Every year, Grandpa planted one more apple tree. When people asked why, since he would not live to see them fruit, he smiled and said, ‘They are not for me.’” What does Grandpa’s answer suggest?
Dua sukarelawan berkongsi $25 dalam nisbah 1 : 4. Berapakah x yang diperoleh oleh orang yang mendapat bahagian lebih besar, dalam dolar?
Gunakan tertib operasi untuk mencari nilai x: x = −6² + 3 × 5.
Bahagian kelenjar adrenal manakah yang merembeskan adrenalin?
Ligamen lutut manakah yang menghalang tibia daripada tergelincir ke hadapan relatif kepada femur?
Ion manakah yang memasuki sel untuk menyebabkan fasa depolarisasi potensi tindakan neuron yang tipikal?
Gabungan tanda manakah yang dijangka pada pesakit dalam syok hipovolemik awal selepas pendarahan besar?
Which body system works with the respiratory system to deliver oxygen to body cells?
Why does the influenza vaccine need to be updated most years?
In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?
A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?
Choose the correct word: “The school’s ___ announced a new policy.”
What is the function of the underlined phrase? “The nurse with the blue badge is my cousin.”
Choose the meaning of the word in bold: “The nurse gave an antipyretic for the high temperature.”
Choose the meaning of the word in bold: “The patient’s speech was incoherent.”
Jawapan: D · He even woke up early on weekends to feed them.
Getting up early on weekends by choice shows that Leo enjoys the job. The other details do not show how he feels.
Jawapan: D · He planted the trees for future generations.
Planting trees he would not see bear fruit, “not for me”, suggests he planted them for others, such as his family or future generations.
Jawapan: x = 20 $
Nisbah dan kadaran: nisbah a : b membandingkan dua kuantiti. Dalam kadaran dua nisbah adalah sama, a/b = c/d, dan anda menyelesaikannya dengan darab silang: a·d = b·c. Untuk berkongsi suatu jumlah dalam nisbah m : n, bahagikannya kepada m + n bahagian yang sama; satu bahagian ialah m bahagian, yang satu lagi n bahagian.
Jawapan: x = −21
Tertib operasi (PEMDAS/BODMAS): kerjakan yang berada dalam kurungan dahulu, kemudian eksponen (kuasa), kemudian pendaraban dan pembahagian dari kiri ke kanan, dan akhir sekali penambahan dan penolakan dari kiri ke kanan. Pendaraban tidak datang sebelum pembahagian, dan penambahan tidak datang sebelum penolakan: setiap pasangan dikerjakan mengikut urutan kemunculannya. Nombor negatif dalam kurungan mengekalkan tandanya apabila dikuasa duakan: (−3)² = 9, tetapi −3² = −9.
−6² bermaksud −(6²) = −36: eksponen datang sebelum tanda tolak.
Jawapan: A · Medula adrenal
Medula adrenal melepaskan adrenalin dan noradrenalin sebagai tindak balas kepada rangsangan simpatetik. Tiga zon korteks menghasilkan hormon steroid.
Jawapan: C · Ligamen krusiat anterior
Ligamen krusiat anterior mengehadkan pergerakan tibia ke hadapan; ujian laci anterior atau ujian Lachman yang positif mencadangkan koyakan ACL.
Jawapan: C · Natrium (Na⁺)
Saluran Na⁺ bergerbang voltan terbuka dan Na⁺ meluru masuk, mendepolarisasi membran. Aliran keluar K⁺ kemudian merepolarisasinya.
Jawapan: A · Takikardia, kulit sejuk dan pucat serta pengeluaran air kencing berkurang
Pengaktifan simpatetik yang didorong baroreseptor menaikkan kadar jantung dan menyempitkan saluran kulit. Perfusi buah pinggang yang berkurang, ADH dan aldosteron menurunkan pengeluaran air kencing.
Jawapan: C · The circulatory system
The lungs load oxygen into the blood, and the heart and blood vessels of the circulatory system carry it to the cells. The same systems bring carbon dioxide back to the lungs.
Jawapan: A · The virus keeps changing its surface proteins through mutation
Influenza viruses mutate often, changing the antigens on their surface. Memory cells from earlier infections or vaccines may no longer recognise the new strain, so the vaccine is updated to match the strains expected to circulate.
Jawapan: A · 15 g
By the law of conservation of mass, the products have the same total mass as the reactants: 10 g + 5 g = 15 g.
Jawapan: A · 80%
Theoretical yield = 2 mol × 30 g/mol = 60 g. Percent yield = 48 ÷ 60 × 100 = 80%.
Jawapan: C · principal
“Principal” is the head of a school (or “main”). A “principle” is a rule or belief.
Jawapan: A · It is an adjective phrase describing “nurse”.
The prepositional phrase tells which nurse, so it works as an adjective modifying “nurse”. The subject is “nurse”.
Jawapan: B · A drug that reduces fever
An antipyretic is a medicine that lowers a raised body temperature.
Jawapan: B · Unclear and not logically connected
Incoherent speech is confused and hard to follow.
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