速凝剂均匀性指标不符合以下哪些要求（）A、液态速凝剂密度应在生产厂所控制值的正负0.

知人喜怒，便加教诲，使为则为，使止则止，比及数岁，可省笞罚。”说明“孝仁礼义”等教育（）

A.应该从小开始

B.无所谓

C.一律从出生开始

D.根据外在环境和孩子自身条件，力求越早越好。

下列关于地球运动的说法，正确的是[ ]

A．地球的运动包括自转和公转

B．自转运动导致昼与夜的产生

C．自转引起四季的更替

D．日月星辰的东升西落说明它们绕着地球转动

阅读下列短文：从每题所给的A、B、C、D四个选项中，选出最佳选项，将正确的选项涂在答题卡上。

C

California Condor’s Shocking Recovery

California condors are North America’s largest birds, with wind-length of up to 3 meters. In the 1980s, electrical lines an d lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical treatment are helping to rescue these big birds.

In the late 1980s, the last few condors were taken from the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico.

Electrical lines have been killing them off. “As they go in to rest for the night, they just don’t see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once.

So scientists have come up with a shocking idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed condors died of electrocution. This has now dropped to 18%.

Lead poisonous has proved more difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.

Rideout’s team thinks that the California condors’ average survival time in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them. ”

The passage shows that（）.

A.the average survival time of condors is satisfactory

B.Rideout’s research interest lies in electric engineering

C.the efforts to protect condors bave brought good results

D.researchers have found the final answers to the problem

下列关于有机物的说法正确的是[ ]

A.乙醇和乙酸乙酯能用水加以鉴别

B.CCl₄和CH₄均属于有机物，所以CCl₄和CH₄都极易燃烧

C.油脂、淀粉、蛋白质均是人体所需的营养物质，且所含元素种类相同

D.苯能燃烧，发生氧化反应，所以苯能使酸性KMnO₄溶液褪色

对于企业，经营性营业利润，必须是构成净利益的最主要组成部分。