带运包裹的重量每个包房不得超过多少？
参考答案：
100千克。
Not only my father but also my grandpa _______ flying to Singapore this weekend. [ ]
A. is
B. are
C. was
天麻对心血管系统的作用表现在
A．加快心率B．降低血压C．加强心缩力D．收缩外周血管E．降低脑血流量
