在一条管路设多台泵时()同时启动。
参考答案:禁止
长方形果园长150米,宽60米。
(1)这个果园的周长是多少米?
(2)如果每2平方米种1棵果树,这个果园一共可以种多少棵果树?
BrainPOP is an educational program consisting of brief animated videos _____ a man named Tim and his robot friend Moby discuss various subjects.
A.in which
B.which
C.as
D.in that