气体灭火剂的使用始于()。A.18世纪末期 B.19世纪初期 C.19世纪中期 D.

题型:单项选择题

问题:

气体灭火剂的使用始于()。

A.18世纪末期

B.19世纪初期

C.19世纪中期

D.19世纪末期

考点:安全工程师安全生产技术安全生产技术6
题型:单项选择题

甲用金属敲打钢管的一端,乙耳朵贴近钢管的另一端听,会先后听到两次响声,其中第一声是通过______传入耳朵的,第二声是通过______传入耳朵的,这说明______.如果把这个实验拿到月球上去做,耳朵贴在钢管的另一端会听见______次响声.

题型:单项选择题
方程x2-x-1=0的根的情况是(   )
A.方程有两个不相等的实数根
B.方程有两个相等的实数根
C.方程没有实数根
D.不能确定
题型:单项选择题

A client calls the physician's office 2 days after a herniorrhaphy to report that his scrotum is swollen and painful. Which of the following instruction by the nurse could promote comfort for the client

A.Apply a snug binder on his abdomen.

B.Have him wear a truss to support the scrotum.

C.Have him lie on his side and place a pillow between his legs.

D.Elevate the scrotum and place ice bags on the area intermittently.

题型:单项选择题

阴囊肿大而透明者为

A.阴茄
B.阴缩
C.水疝
D.寒疝
E.狐疝

题型:单项选择题

营业网点柜员接收委托单位批量代工纸质清单及电子数据,应审核()

A、纸质清单格式是否符合要求

B、清单印章真伪与否

C、审核通过后,在纸质清单上加盖个人名章及业务用公章

D、与委托单位办理接收登记手续

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