被交流干扰的管道与钢铁地床直接相连，这种排流方法叫（）。
A.直接排流
B.隔直排流
C.负电位排流
D.钳位式排流
参考答案：A
—Have you thought of the topic for the composition?
— Not yet．I _____ it very carefully, but I haven’t decided．
A．will consider
B．have been considering
C．had considered
D．was considering
论述领导者如何开展沟通和协调。
