Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. If the woman wants to go up the hill, what should she do
A. She should keep leaning forward.
B. She should cross.
C. She should go step by step like a crab.
D. She should point the tips together.
查看答案
A.弹性动脉 B.肌性动脉 C.心内膜向心内突起 D.内弹性膜 E.内膜增厚
A. T淋巴细胞发源于
随着年龄的增长,钙与磷的摄入比例应相对增加。( )
A. 对
B. 错
A.弹性动脉 B.肌性动脉 C.心内膜向心内突起 D.内弹性膜 E.内膜增厚
A. 分泌盐酸
酸奶可防止腐败菌分解蛋白质,产生毒物堆积,具有防治肿瘤的作用。( )
A. 对
B. 错