预探井在非目的层段设计钻时录井的总原则是（）m1点。
A.1
B.2
C.5
D.10
参考答案：A
有一个物体以初速度v0沿倾角为θ的足够长的粗糙斜面上滑，已知物体与该斜面间的动摩擦因数μ< tanθ，那么能正确表示该物体的速度v随时间t变化的图线是：[ ]
A ．
B ．
C ．
D ．
A newcomer can find that a new environment is difficult to ______.
A．deal with.
B．be dealt with.
C．dealing with.
D．being dealt with.
