Information gap refers to the second language learning situation where information is known only by some of students, and it promotes real communication and provides an opportunity for extended speaking.
A、正确
B、错误

单项选择题在螺栓联接中,有时在一个螺栓上采用双螺母,其目的是A. 提高强度B. 提高刚度C. 防松D. 减小每圈螺纹牙上的受力

单项选择题He could not himself any longer from losing his temper when he learned that his teenage son had skipped class again. A、assume B、 yield C、abandon D、 restrain