问题 问答题 简答题

什么叫生长因子?它包括哪几类化合物?

答案

参考答案:

生长因子:必需,微量的特殊有机营养物,但不能自身合成

种类:氨基酸、维生素、嘌呤、嘧啶等

完形填空

Today Chinese people can enjoy longer holidays. They have more time to      .

Zhang Haitao, a middle school student from Shanghai,       to Japan with his parents

    vacation.” Travelling in different countries has always been a dream of     ,” Zhang said.

  are you going to Japan, by ship or by plane?” I asked him.

“By ship. Travelling by ship is more     than by plane.”

“But a plane is much     than a ship.”

“Yes, but you can’t see much on a plane, while a sea trip can       you happy because you can see the beautiful sea, islands and even big fish.”

“Will the trip cost a lot?” “Certainly.       my father is a businessman. He has      much money in the last three years. Thanks to him, we can go on our trip.”

小题1:A. eat               B. sleep             C. travel

小题2:A. go               B. is going           C. goes

小题3:A. to                B. with              C. for

小题4:A. my               B. mine            C. me

小题5:A. How             B. When             C. What

小题6: A. dangerous         B. interesting         C. difficult

小题7: A. faster             B. slower            C. more expensive

小题8: A. give              B. tell               C. make

小题9: A. But              B. Or                C. So

小题10: A. lost              B. found             C. saved

单项选择题