【单选题】听力原文:W: Everyone seems to be on a diet. Have you noticed that? M: Yes, a neighbor of mine is on a banana diet. She eats one banana for breakfast, one for lunch, and two for dinner, yet she doesn't loo...
A.
Her diet is not effective.
B.
She has lost much weight.
C.
Her favorite food is banana.
D.
She has neither gained nor lost weight.
【单选题】— Have you noticed some people _____ to check the exact signature before sending a text message? — It happens. [ ]
【单选题】Have you noticed how he never looks ______ at you?
【简答题】与酶蛋白结合较为紧密的辅助因子是(),较为疏松的是()。
【简答题】变频器是把 频率的交流电变成 频率的交流电。
【单选题】Have you noticed the problem ___ he is now in low spirit ? ____ come?
【单选题】—Have you noticed the _____ fish there? How long have they _____? —They _____ several days ago. [ ]
C.
death, been dead, died
【判断题】变频调速是用变频器向交流电动机供电而构成调速系统。变频器是把可调电压、可调频率的交流电变换成固定电压、固定频率的交流电。