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【简答题】
共价键的本质是由于原子相互接近时轨道重叠,原子间通过共用自旋相反的( )使体系能量降低,从而成键。
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【单选题】下列与人的生理有关的叙述中，不正确的是（ ）
A.
糖类在人体内代谢的最终产物是CO 2 和H 2 O
B.
人的胃液中含有少量盐酸，可以帮助消化
C.
剧烈运动时人体代谢加快，代谢产物不能及时排出，血液的pH升高
D.
煤气中毒主要是CO与血红蛋白牢固结合，使血红蛋白失去输氧能力
【简答题】人的胃壁细胞能产生胃酸，胃液中含有少量盐酸可以帮助消化，但胃酸过多会导致消化不良和胃疼，患有胃酸过多症的病人常服用抗酸药物以减轻病痛。若抗酸药物的主要成分有氢氧化镁和碳酸氢钠，请回答： (1)写出抗酸药物发挥功效时的化学方程式 （任选一例即可） 。 (2)抗酸药一般要嚼碎后服用，其中的道理是： 。
【单选题】Q3 What makes the woman afraid of getting old?
A.
Having little to look forward to
B.
Facing the day to retire from work
C.
Physical inability and loneliness
D.
Lack of someone to depend on
【简答题】听下面一段材料，回答第1-3题。 1. What makes the woman worried? A. That she is too fat. B. That she has no nice clothes. C. That she will lose her job. 2. How is the woman? A. Very poor. B. Very busy. C. Very proud...
【简答题】人的胃液中含有少量的盐酸。按要求将有关的化学方程式填写在横线上。 （1）胃酸过多时，常服用含有氢氧化铝的药物，其作用是_____________。 （2）Ba 2+ 有毒。用X射线检查胃病时常服用钡餐（硫酸钡），但误服碳酸钡可引起中毒，其中的原因为__________________。 （3）误服碳酸钡中毒后可立即服用泻药（硫酸镁）来解毒，原因是____________________。
【简答题】简述有限元等参变换及其等参单元。
【单选题】What makes the woman want to call Elizabeth?
A.
She owes her a great favor.
B.
She is sure that Elizabeth would help them.
C.
Elizabeth has always been so helpful.
D.
It’s still early.
【单选题】Q1: What makes Big Sky Park a nice vacation place for the couple? Q2: How can the couple get all their camping stuff on the bus? Q3: What will the woman probably do before their trip? Q4: What does th...
A.
It is in their neighborhood
B.
It is near the woman's family.
C.
It is an entertainment park.
D.
It has nice paths and camping sites.
【简答题】Q1: What makes Big Sky Park a nice vacation place for the couple? Q2: How can the couple get all their camping stuff on the bus? Q3: What will the woman probably do before their trip? Q4: What does th...
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