既能分泌激素,又能分泌消化液的是[ ]
A、垂体
B、甲状腺
C、胰
D、性腺
答案:C
Complete the sentence with the right preposition. 用介词填空。
1. My mother goes to work bicycle. I go to school foot.
2. He was here a quarter to eleven. Now he is the tree.
3. The old lady blue is blind. She can't see her eyes.
4. A storm is coming the Atlantic Ocean.
由于()变幅液压油缸所需推力小,并能改善吊臂受力、所以应用普遍。
A、前倾式
B、后倾式
C、后拉式