既能行气止痛,又能温肾纳气的药物是()
A.丁香
B.沉香
C.檀香
D.青木香
E.香橼
参考答案:B
下列哪种现象不是生物对环境的适应[ ]
A.沙漠鼠夜晚活动
B.仙人掌的叶变成刺
C.秋天大雁由北方飞向南方越冬
D.蚯蚓在土壤中活动、可使土壤疏松
The earthquake which happened in Yushu 14th April 2010 was a big disaster. [ ]
A. at
B. on
C. in
D. to