现在，尼罗河下游的农作物熟制是[ ]
A．一年一熟
B．两年三熟
C．一年两熟或三熟
D．一年四熟
答案：C
When Peter speaks in public, he always has difficulty ______ the right things to say.
A．thinking of
B．to think of
C．thought of
D．think of
下列经脉中，不与脏腑连属的是（）。
A.太阳经
B.厥阴经
C.太阴经
D.阳明经
E.带脉
