具有强筋骨功能的头痛类用药是()
A.通天口服液
B.清眩丸
C.天麻头风胶囊
D.血府逐瘀汤
参考答案:C
The environmentalists said wild goats’______ on the vast grasslands was a good indication of the better environment.
A.escape
B.absence
C.attendance
D.appearance
在标准状况下,相同体积的下列气体所含物质的质量最小的是( )
A.CH4
B.N2
C.O2
D.C2H2