题目

在绿色植物各项生理作用的叙述中，错误的是（ ） A . 植物吸收的水分主要用于蒸腾作用 B . 呼吸作用是所有动植物的共同特征 C . 光合作用在碳﹣﹣氧平衡中起重要作用 D . 呼吸作用释放的能量全部用于生命活动 答案：D完形填空（共10小题；每小题1分，满分10分）阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中，选出能填入短文相应空白处的最佳选项。Hello，my name is David. Last summer I a great vacation.I went across the USA with my parents car. We drove six to eight _ a day. In big cities，we stayed in big hotels. The food __ usually delicious. Most of the hotels had __ pools and game rooms. I played there happily. But there were too many people in the hotels，so we often had to sleep in one room. And it was __ ，too.Sometimes，we __ in a small wooden house in the mountains. I really loved it. The cabin（小木屋） was clean ___ quiet. We had two rooms，so I could get up late in the morning. We always got up early __ we wanted to go swimming. ___ was a beautiful lake near the small wooden house. We also went fishing and cooked food outside.1.A. have B. has C. had D. having2.A. by B. with C. of D. from3.A. years B. months C. hours D. weeks4.A. were B. are C. is D. was5.A. swim B. swims C. swimming D. swam6.A. high B. low C. cheap D. expensive7.A. worked B. studied C. stayed D. cleaned8.A. but B. or C. not D. and9.A. if B. because C. after D. before10.A. There B. It C. This D. That