题干

植物越冬休眠和夏天生长受多种激素的调节,如下图所示。有关叙述正确的是(    )

A:越冬休眠时,植物体内的赤霉素和脱落酸的含量都会增加

B:秋末①→③→⑤过程能增加叶肉细胞内的胡萝卜素含量,提高光合作用速率

C:夏季①→③→④过程能增加植物体内细胞分裂素含量,促进植物生长

D:各种植物激素通过直接参与细胞内的代谢过程实现对生命活动的调节

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C

同类题4

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    About 30 years ago, I left Cuba for the United States with my son. After getting settled finally in Brunswick, New Jersey, I enrolled(注册) my son in kindergarten. Several weeks later, my son’s teacher asked me to meet him at his office.

    In the teacher’s office, and exchange of greetings was followed by his questions: “Is your son mentally retarded(弱智的)?Does he suffer from any kind of mental disability?”

    Was he talking about my wonderful Scola? NO, no, it can’t be. What a helpless, lonely moment! I told him that Scola was a quiet, sweet little boy, instead. I asked him why he was asking me all these questions.

    My son could not follow the teacher’s directions, he told me, and thus, Scola was disrupting the class, Didn’t he know my son did not speak English yet?

    He was angry; “Why hasn’t your son been taught to speak English? Don’t you speak English at home?”

    No, I didn’t speak English at home, I replied. I was sure my son would learn English in a couple of months, and I didn't want him to forget his native language. Well, wrong answer! What kind of person would not speak in English to her son at home and at all time? “Are you one of those people who come to this country to save dollars and send them back to their country, never wanting to be a part of this society?”

    Needless to say, I tried to tell him I was not one of “those people.” Then he told me the meeting was over, and I left.

    As I had expected, my son learned to speak English fluently before the school year was over. He went on to graduate from college and got a job, earning close to six figures. He travels widely and leads a well-adjusted, contented life. And he has benefited from being bilingual(双语的)。

    Speaking more than one language allows people to communicate with others; it teaches people about other cultures and other places—something very basic and obviously lacking in the “educator” I met in New Jersey.