Cattle _____ on the hillside.[ ]
a. grazes
b. is grazing
c. was grazing
d. were grazing
d
The train ________ here at 6 o’clock.
A.arrived
B.arrived to
C.arrived in
D.arrived at
风湿性心脏病心力衰竭患者用洋地黄和利尿药治疗,出现发热、关节疼痛、窦性心动过速,应首先考虑()
A.心力衰竭加重
B.洋地黄不足
C.洋地黄中毒
D.风湿活动
E.电解质紊乱