翻译:文倦于事,愦于忧,而性懧愚。
参考答案:
我被事物弄得疲倦,被忧虑弄得头昏,而且性情懦弱愚笨。
—_____ behind the door?
—No, they aren't. [ ]
A. Where are
B. What's
C. Are those keys
D. Is the key
已知氨气也能还原氧化铜,其反应的化学方程式为:2NH3+3CuO═3Cu+3H2O+X,其中X的化学式为( )
A.N2H4
B.N2
C.N2O
D.N2O4