下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Color is very important to most animals for it helps them to get along in the world. Color (21) to make an animal difficult for its enemies to (22) . Many animals match their (23) so well that as lon...
A.
Even if
B.
Unless
C.
However
D.
As long as
【单选题】诊断外伤性脾破裂，下列哪项最重要（）。
A.
有腹部外伤史
B.
出现寒战高热及休克症状
C.
左下腹有压痛
D.
诊断性腹腔穿刺，抽出不凝固的血
E.
脾脏有慢性病理改变