皮皮学，免费搜题
登录
搜题
【单选题】
1-2. 20CrMoTi是一种合金结构钢,元素符号前面的“20”表示( )。A.
钢中含合金元素量为2%
B.
钢中含合金元素量为0.2%
C.
钢中含碳量为2%
D.
钢中含碳量0.2%
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The two persons sitting on front seats in a car need to wear
A.
no-slipping shoes
B.
crash helmets
C.
seat belts
D.
glasses
【单选题】The whole program is well designed, but some details need further ______ by some experts.
A.
proofing
B.
modifying
C.
demonstrating
D.
polishing
【简答题】完形填空。 My father _ _1 __ a good friend in the factory. He is sixty. He is an old man. All of the children like him. We call __ 2_ __ Uncle Sam. He __ 3__ from England. He __ 4_ _ in Sichuan. He can'...
【单选题】关于胃底腺主细胞的描述，哪项错误
A.
主要位于腺的颈部
B.
细胞呈柱状，细胞核位基底部
C.
大量的粗面内质网聚集在核周围细胞基部
D.
胞质嗜碱性
E.
分泌胃蛋白酶原被盐酸激活
【单选题】He put up a large notice made of good strong wood in order ______.
A.
to tell the children not to throw stones at the notice
B.
to warn the boys not to throw stones
C.
to attract the boys to throw stones at the notice
D.
to warn them whoever threw stones would be punished
【单选题】关于胃底腺主细胞的描述,哪项错误
A.
主要位于腺的颈部
B.
细胞呈柱状，细胞核位基底部
C.
胞质嗜碱性
D.
分泌胃蛋白酶原被盐酸激活
E.
HE标本中胞质呈空网状
相关题目：