轮状病毒肠炎常伴有（）。
A.发热，上呼吸道感染症状
B.皮疹
C.肝大
D.淋巴结肿大
E.肠紊乱
参考答案：A
- I called on you but you were not in last night.
- Because I ________ supper with my parents in a restaurant. [ ]
A. has had
B. had
C. was having
D. had had
当盐水浓度增大到共晶点时、凝固点达到（）。
A、最低点
B、最高点
C、共晶点
