货舱的排列是从船首至船尾数的,一般货舱的长度不大于()m。
A、30
B、40
C、35
D、45
参考答案:A
阅读理解
The students are having a basketball game. Li Lei from Class One is running with the ball. Tom from Class Two is stopping Li Lei, but Tom can’t. Look! Li Lei is throwing the ball to Jim. Jim gets the ball
to the basket. Oh, it’s a pity! The ball isn’t in Now. Wei Dong from Class Two has the ball. Li Lei is
stopping him. Li Lei gets the ball. He is running quickly with the ball. Look! He is jumping and shooting at
the basket! Great! He shoots the basket. The score(比分) is 1:0.
1. Who are in the same team? (同一个队)
A. Jim and Wei Dong
B. Li Lei and Jim
C. Tom and Jim
D. Tom and Li Lei
2. What are they playing?
A. Volleyball
B. Football
C. Chess
D. Basketball
3. Jim is the basketball.
A. missing
B. kicking(踢)
C. running
D. jumping
4. is jumping and shooting at the basket. He shoots it.
A. Wei Dong
B. Li Lei
C. Jim
D. Tom
5. Who are the winners now?
A. Tom
B. Class One
C. Li Lei
D. Class Two
如图所示,小华将弹簧测力计一端固定,另一端钩住长方体木块A,木块下面是一长木板,实验时拉着长木板沿水平地面向左运动,读出弹簧测力计示数即可测出木块A 所受摩擦力大小.在木板运动的过程中,以下说法正确的是( )
A.木块A 受到的是滑动摩擦力
B.木块A 相对于地面是运动的
C.拉动速度变大时,弹簧测力计示数变大
D.木块A 所受摩擦力的方向向左