与口腔白斑病病因有关的因素有（）。
A.吸烟
B.白色念珠菌的感染
C.微量元素锰的缺乏
D.局部理化刺激
E.免疫缺陷
参考答案：A, B, C
写出单词的正确形式。
1. We are writing to you about ___________(保护) wild animals.
2. If farmers _________(继续)to make new farmland, wild animals won't get enough food.
3. His job is (喂)animals.
4. You can know the weight of the apples after (称重量) it.
5. Hunters will make a lot of money if they sell __________(大象) tusks.
急性胰腺炎时，尿淀粉酶（）急性胰腺炎时，血淀粉酶（）急性胰腺炎时，血清脂肪酶（）
A.增高最早
B.增高稍晚
C.增高最晚
D.不增高
E.持续增高
