电动阀执行机构中只有电动机。
参考答案：错
解析：电动阀执行机构中有电动机和传动机构。
His first novel ________ good reviews since it came out last month.[ ]
A. receives
B. is receiving
C. will receive
D. has received
常吃海带、裙带菜等．可预防的疾病是（ ）
A．侏儒症
B．地方性甲状腺肿
C．冠心病
D．糖尿病
