下列哪项症状在门静脉高压症时不出现
A．下肢静脉曲张
B．脐周静脉曲张
C．胃黏膜出血
D．血小板减少
E．脾肿大
参考答案：A
The boy doesn’t sing ________ the others, but he dances best of all.
A．so well as
B．as good as
C．more worse than
D．more better than
同一回次中不同岩性的岩心磨损程度相差很大，叫做（）。
