钢尺量距的精密方法通常要加哪几项改正()。
A、尺长改正
B、温度改正
C、倾斜改正
D、拉力改正
E、自重改正
参考答案:A, B, C
He has _____ that sometimes he can't see an inch ahead. [ ]
A. so poor eyesight
B. such poor eyesight
C. such a poor eyesight
D. so poor an eyesight
我国第一座森林公园是()国家森林公园。
A.华山
B.黄山
C.九寨沟
D.张家界