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【单选题】
为避免铸造时产生缩孔或裂纹，铸件的壁厚应该（ ）。A.
没有要求
B.
不需要过渡
C.
必须一样厚
D.
大致相等，或缓慢过渡
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】After an earthquake in Los Angeles, young people______.
A.
get nervous because of aftershocks
B.
have training with famous police
C.
take care of people with major injuries
D.
prepare supplies for people in the disaster
【简答题】汽车空调制冷剂的作用是什么?
【单选题】_________ ? -- Yes ,please. I’d like two tickets to Los Angeles. A. Have you been to Los Angeles? B. Can I help you ? C.Do you have the tickets? D. Can I get the tickets?
A.
Have you been to Los Angeles?
B.
Can I help you ?
C.
Do you have the tickets?
D.
Can I get the tickets?
【单选题】A note in the pocket can hardly serve as a reminder because______.
A.
it will easily get lost
B.
it's not clear enough for you to read
C.
it's out of your sight
D.
it might get mixed up with other things
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