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我国有句古语：“儿不嫌母丑，狗不嫌家贫”。下列对这句话理解不正确的是[ ]

A．无论父母怎样，都不能说“不是”

B．我们与父母的关系是不可选择的

C．没有十全十美的家庭，没有十全十美的父母

D．不管出生在什么家庭，我们与父母的血缘亲情是无法改变的

将战略控制按控制方式划分，可以分为（）。

A.前馈控制

B.反馈控制

C.实时控制

D.直接控制

E.回避控制

The Environmental Protection Agency must respond to the hazard to children’s health posed by exposure to asbestos fibers released in the air in school classrooms. Since it is impossible to close school buildings, the best plan would be to initiate programs that mandate the immediate removal of asbestos from all the school buildings that are found to contain asbestos, regardless of whether or not the buildings are in use.
Which of the following, if true, is the pest reason for the Environmental Protection Agency not to follow the plan outlined above

A．The techniques available for removing asbestos often increase the level of airborne asbestos.

B．Schools are places where asbestos is especially likely to be released into the air by the action of the occupants.

C．Children exposed to airborne asbestos run a greater risk of developing cancer than do adults exposed to airborne asbestos.

D．The cost of removing asbestos varies from school to school, depending on accessibility and the quantity of asbestos to be removed.

E．(E) It is impossible to determine with any degree of certainty if and when construction materials that contain asbestos will break down and release asbestos fibers into the air.

物资供应计划按其内容和用途，主要有( )。

A．物资需求计划

B．建设单位采购供应

C．申请与订货计划

D．专门物资采购部门供应

E．采购与加工计划

破伤风痉挛毒素致病机制是

A．破坏细胞膜使细胞裂解
B．抑制易感细胞的蛋白质合成
C．阻断上、下神经元之间正常抑制性介质的传递导致肌肉痉挛
D．抑制神经末梢释放乙酰胆碱，影响神经冲动的传递，导致肌肉迟缓型麻痹
E．激活细胞内腺苷酸环化酶，使cAMP的水平增高，使黏膜细胞的分泌功能增强