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【单选题】
Look. Lucy is_____ a new bike today. A. jumping B. running C. D 2. The children _____ football. A. is playing B. are playing C. play the D. play a 3. They ______TV in the evening. They do their homework. A. are watching B. can't watching C. don't watch D. don't watching 4. Listen! She____ in the classroom. A. is singing B. sing C .to sing D. is sing 5. ______are you eating? I'm eating ______ meat. A. What,some B. Which,any C. Where,not D. What,a 6. Is she ____ something? A. eat B. eating C. eatting D. eats 7. I can't catch up with the fashion,because the clothes style_______ all the time. A. has changed B. is changed C. is changing D. changed 8.Look! The children_______ basketball on the playground. A. plays B. played C. is playing D. are playing 9.Jack and Ketty_______ in the lake. Let's join them,shall we? A. swim B. have swum C. swam D. are swimming 10.It's six in the afternoon. The Greens_______ lunch together. A. has B. are having C. have had D. had had
A.
jumping
B.
riding
C.
takeing
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参考答案:
举一反三
【单选题】对于大气污染定义的本质特征描述不正确的是_____。
A.
人类活动引起
B.
持续时间长
C.
足够的浓度
D.
危害健康和环境
【简答题】肌的起点和止点
【简答题】大气污染的定义是什么?
【简答题】5-1 大气污染的定义是什么?
【简答题】主动攻击最常见的方式有哪些?
【简答题】大气污染源的定义是什么?
【单选题】在单缝夫琅和费衍射实验中,波长为λ的单色光出入射到宽度为α=4λ的单缝上,对应于衍射角为30°的方向,单缝处波阵面可分成的半波带数目为( )。
A.
2个
B.
4个
C.
6个
D.
8个
【简答题】大气污染的定义是什么?
【单选题】以下关于户外日光照射的作用不正确的是:( )
A.
可使照射部位血流增快
B.
可使人食欲增加
C.
红外线可抑制细菌、病毒活力
D.
可减少病人与外界隔离感
E.
紫外线可杀死细菌和病毒
【简答题】肌肉的起点和止点
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