蔬菜植物在发育过程中需要一定长短的昼夜交替的光周期条件才能（）的现象称为光周期现象。
A、旺盛生长
B、开花
C、休眠
D、养分积累
参考答案：A
He doesn't do his homework _____, though he has _____.[ ]
A. carefully enough , enough time
B. enough carelessly, time enough
C. carelessly enough, enough time
D. enough carefully,enough time
现代饭店的中型厨房大多分为哪两部分（）。
A.粤菜；川菜
B.中菜；西菜
C.浙菜；鲁菜
D.晋菜；湘菜
