屋脊棱镜能使光线(),又使像(),它在光学经纬仪的读数系统中得到广泛的应用。
参考答案:改变方向、倒转
Doris' success lies in the fact _____ she is co-operative and eager to learn from others.
[ ]
A. which
B. that
C. when
D. why
H1受体阻断药对哪种病最有效()。
A.皮肤黏膜过敏症状
B.支气管哮喘
C.过敏性休克
D.过敏性紫癜
E.血清病高热