环丙沙星的结构为
A.异烟肼B.阿司匹林C.氧氟沙星D.小檗碱E.甲丙氨酯
参考答案:C
解方程:6x(1-x)-4x(1-x)=16-2(x2-2)
Immersion suits must be stowed().
A.in the pilothouse
B.on top of lockers
C.where readily accessible
D.on open deck areas