皮皮学，免费搜题
登录
搜题
【单选题】
压杆临界力的大小, 。A.
只与压杆所承受的轴向压力大小有关
B.
与压杆的柔度大小有关，与压杆所承受的轴向压力大小无关
C.
与压杆的柔度大小无关，与压杆所承受的轴向压力大小有关
D.
以上说法均不正确
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】the aftemoon he often plays computer games. But yesterday afternoon he did some washing. [ ]
A.
In; in
B.
/; in
C.
In; /
D.
/; /
【简答题】估算。 19×39≈ 31×21≈ 42×59≈ 13×28≈ 48×29≈ 51×51≈
【单选题】—What does your uncle do? —_____. [ ]
A.
He is Mr Green
B.
He is from Japan
C.
He often plays tennis after school
D.
He is a worker
【简答题】估算 74×22≈ 51×68≈ 59×92≈ 298+205≈ 432-228≈ 82÷8≈ 38×53≈ 77÷4≈
【单选题】The boy often _________basketball after school. But now he _________piano.
A.
plays; is playing the
B.
play the; plays
C.
is playing the; is playing
D.
plays the; is playing