一切电磁现象都起因于（）及其运动。A、电流 B、电压 C、电荷 D、电场

风险管理是社会组织或者个人用以降低风险消极结果的（）。

A.决策过程

B.管理过程

C.评价过程

D.测算过程

Today, we’ll talk about what other effects watching TV might produce on children. Children should be (1) a lot of television, many experts and parents agree, but there is at least one circumstance when it might be beneficial: (2) . A recent study conducted by Italian researchers found that children (3) immediately preceding and during blood tests experienced less pain than children whose mothers (4) during the procedure, or children whose mothers were present but (5) .
The research, led by Carlo Brown, MD, at the University of Siena, is published in the Archives of Disease in Childhood. (6) the study. None received any type of anesthesia; the children and their mothers (7) . Both the group whose mothers attempted to distract them from the blood tests and those whose mothers simply observed reported (8) than the group who watched cartoons. For that group, the levels of pain were less and the children were better able to (9) .
One of the possible explanations is that children might have (10) during the procedures, exacerbating their perception of pain. "The higher pain level reported by children during (11) shows the difficulty mothers have in interacting positively (12) in their children’s life," the authors write.
However, they stressed that (13) still provided benefits, noting that the children would (14) during the procedures. "Indeed, children state that having their parent present (15) when in pain," say the authors.
Another possibility offered for consideration is the notion that the (16) might release pain-quelling endorphins. Endorphins, (17) produced by the pituitary gland, resemble opiates in their ability to produce analgesia and a sense of well-being. In other words, they might (18) .
In any case, the study results suggest that health workers should (19) to watch television during painful procedures (20) .

某农药厂因排放污水，给附近农民造成很大损失。陈某等十几名农民共同向法院起诉要求农药厂赔偿损失。人民法院发出公告，通知受害农民在规定期限内向法院登记。以下说法错误的是：

A．公告期限最少不得少于30日

B．向人民法院登记的当事人若不能证明其与对方当事人的法律关系和所受到的损害，则法院不予登记，当事人不能参加诉讼，但可以另行起诉

C．法律的判决只能在登记的当事人之间发生效力，未参加登记的当事人不能直接适用该判决

D．未参加登记的权利人在诉讼时效期间内提起诉讼，人民法院认定其请求成立的，应当另行作出判决

设计结构表面外露的模板，当验算模板及其支架的刚度时，其最大变形值为模板构件计算跨度的______。

A．1/400
B．1/250
C．1/1000
D．1/600

液氨充装系数：在10℃充装液氨时，只可装容器体积的（）。在0℃充装时，允许装料为容器的（）。当在－10℃充装时则更少，装料不可超过容器体积的（）。只有这样，才能保证在设计温度（）下，容器内仍有10%的气相空间。