用EDTA标准溶液测定某金属离子时,必须使溶液的酸度高于允许酸度。()
参考答案:错
Make sentences with the words. 组词成句。
1. is this bed my cousin's (.)
2. your please make dresser (.)
3. eleven nine minus twenty is (.)
4. know now ABCs my I (.)
胸主动脉瘤的主要临床表现是()
A.胸痛
B.膈肌麻痹
C.搏动性肿块
D.邻近器官或组织被压迫或侵犯时才会有临床症状
E.呼吸困难