紫杉醇是一种新型抗癌药,其分子式为 C47 H51NO14,它是由如下的A酸和B

题型:填空题

问题:

紫杉醇是一种新型抗癌药,其分子式为 C47 H51NO14,它是由如下的A酸和B醇生成的一种酯。

B.  R-OH(R是一个含C、H、O的基团)

(1)A可在无机酸催化下水解,其反应方程式是____。

(2)A水解所得氨基酸不是天然蛋白质的水解产物,因为氨基不在(填希腊字母)___位。

(3)写出ROH的分子式___。

考点:氨基酸分子式
题型:填空题

下列生理功能或生化反应与ATP的消耗有关的是

①光反应 ②暗反应 ③叶肉细胞吸收CO2 ④小肠吸收葡萄糖和氨基酸 ⑤DNA复制 ⑥葡萄糖的氧化分解 ⑦神经传导  [ ]

A.①②③⑥

B.②④⑤⑦

C.①④⑤⑦

D.③④⑥⑦

题型:填空题

One night a man came to our house and told me, “There is a family with eight children. They have nothing to eat for days.”

I took some food and went. When I finally came to the family, I saw the ugly face of those little children by hunger. There was no sorrow (悲伤) or sadness in their faces, just the deep pain of hunger.

I gave the rice to the mother. She divided(分) it into two, and went out, carry half the rice with her. When she came back, I asked her, “Where did you go?” She gave me this simple answer, “To my neighbours----they are also hungry.”

I was not surprised that she gave----because poor people are unselfish(无私的). But I was surprised that she knew they were hungry. As a rule, when we are in trouble, we think more about ourselves, and have no time for others.

小题1: The writer thought poor people were _________.

A.lucky

B.generous

C.ugly

D.sad小题2: The mother went out to _________.

A.give some rice to her neighbours

B.look for her children

C.cook the rice

D.buy some rice小题3:Which is not true about the story?

A.The story happened at night.

B.The family was kind and generous.

C.The family had nothing to eat because they were lazy.

D.As a rule, we have no time for others when we are in trouble.

题型:填空题

一种家用电熨斗的规格为“220V 1100W”。在额定电压下,这种电熨斗工作时的电流是多少?工作1min产生的热量是多少?

题型:填空题

乏特氏(VATER)壶腹周围癌不包括

A.乏特氏壶腹癌
B.胆总管下端癌
C.胰管开口癌
D.十二指肠 * * 及附近十二指黏膜癌
E.胰头癌

题型:填空题

投资者李女士计划投资证券投资基金,以期取得较为理想的收益,但她发现有很多基金名称不同,对应的投资策略也不同。其中很少分红,经常将投资所得的股息、红利和盈利进行再投资,以实现资本增值的基金是( )。

A.成长型基金

B.收入型基金

C.平衡型基金

D.保本基金

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