在带GAC调速装置的康明斯发电车中，电子启动器是（）。
A.ESD5520
B.LSM201
C.SYC6714
D.501K
参考答案：D
He often asks his neighbour to look after his pet during his _______.
A．lack
B．absence
C．leaving
D．missing
砂中含泥量砼强度等级≥C30应≤（），＜C30应≤（）。
