【简答题】Complete the following sentences by choosing the correct word from those given in brackets. 22. We have done (many, much) work today.
【单选题】下列关于有机物的说法正确的是
D.
蛋白质和油脂都属于高分子化合物,一定条件下都能水解
【简答题】在液压传动中,液压泵是( )元件,它将输入的( )能转换为( )能
【单选题】We have__________of time to catch the train.
【简答题】在液压传动中,液压泵是()元件,它将输入的()能转换成()能。
【单选题】—Have you heard today’s weather forecast?—Yes. Better weather is____. We can expect an outing. A.
A.
22.—Have you heard today’s weather forecast? —Yes. Better weather is____. We can expect an outing. A.in the way
【单选题】We _____ to the zoo yesterday. A. have been B. go C. went
【单选题】在液压传动中,液压泵是( )元件,它将输入的机械能转换成压力能,向系统提供动力。