用光学平直仪检查导轨水平面内的直线度误差时,只要将目镜按照顺时针方向旋转900,使微动手轮与望远镜垂直即可测和。
参考答案:对
—Oh, Jesus, I can’t cut the durian (榴莲) into two halves however I tried!
—Easy, boy! Why not use _____ knife?
A.a sharp
B.the sharper
C.a sharper
D.the sharpest
黏膜保护药是()
A.氢氧化铝
B.奥美拉唑
C.硫糖铝
D.甲硝唑
E.丙胺太林