题目

She usually washes her hands under the tree（改为一般疑问句并补全肯定答语）—she usuallyher hands under the tree?—Yes 答案：【1】Does【2】wash【3】she【4】does有两位同学的质量分别是40千克和50千克，他们能否同时乘坐载重为800牛的小车？试用计算说明．