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【多选题】
齿轮副侧隙的作用主要有 ( ) 。A.
补偿热变形
B.
便于装配
C.
储存润滑油
D.
节省原材料
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】If you ever have a chance to go to Finland(芬兰), you'll probably be surprised to find how 'foolish' the Finnish people are. You can go anywhere for one dollar, tell the driver to drop you at any place,...
A.
friendly
B.
crazy
C.
stupid
D.
funny
【简答题】某角度进行了两组同精度观测,其最或是值及其中误差分别为L1、m1和L2、m2。今分别以m1和m2为单位权中误差计算出两组的权分别为2、4和3、6;则以这两组权分别计算出该角的两个加权平均值及其中误差是( )。
【单选题】–I’ll be back at 4:30. Will you still be here? -- I’m afraid not. I’ll probably have gone out _______ then.
A.
by
B.
since
C.
from
D.
till
【简答题】下列现象中,物体运动状态没有发生改变的是( ) A. 小朋友正在荡秋千 B. 降落伞在空中竖直匀速下落 C. 关闭发动机后向前滑行的汽车 D. 从手中掉落的皮球
【单选题】I’ll probably see you on Sunday；____ ， it will be on Monday.
A.
thus
B.
then
C.
after all
D.
if not
【单选题】- ________________ - Most probably we'll stay with my parents.
A.
How do you get to the station?
B.
How do you spend the Spring Festival?
C.
How was your Spring Festival?
D.
How do you like the Spring Festival?
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