问题
选择题
—Miss White has decided to explore in the forest by herself.
—She________ask her boyfriend to if she ________go walking in the forest.
A．needn't to; dares to
B．doesn't need; dares
C．need not to; dare to
D．needn't; dare
答案
答案：D
本题考查need和dare作情态动词和实义动词的用法。
、
以及内阻
和
．由测得的数据在U—I图上分别它们的图线直线1和直线2，如图4所示，由图可以判断：（ ）