鸟类的孵卵行为说明鸟类的体温特点是[ ]
A．孵卵与体温无关
B．高而恒定的
C．高而不恒定的
D．变温的
答案：B
已知A={1，2，3，4，5，6，7，8，9}，B={1，2，3}，C={3，4，5，6}，则A∩（B∪C）=______．
. I was _____lost in the English Evening last night. There was nothing like it.
A．thoroughly
B．partly
C．apparently
D．constantly
