关于44.what type of trees were used to making masts?
A. Sugar maple.
B. Oak.
C. White pine.
D. Birch.
文中明明说了 These white pines were straight and tall, perfect for uses as masts on the sailing ships of the time.
为什么选D呢?
还有48题
48.according to the talk, how does the Australia spiders attract the other kinds of spiders?
. A. By changing its appearance.
B. By imitating signals that the other spiders send.
C. By spinning a large web.
D. By imitating insects caught in a web.
文中写了It’ll sit at the edge of another spider's web and attract the spider by tapping out different signals to mimic the struggles of a trapped insect
为什么答案选B?