ITP的血小板减少的原因是 （） A.血小板生成减少 B.血小板消耗过度 C.血小

如图为菜粉蝶的生活史，请据图回答下列问题：

（1）菜粉蝶和菜青虫的关系是______．

（2）菜青虫总是取食十字花科植物，请探究这一行为是先天性行为吗？你作出的假设是______．

（3）实验中，从菜青虫的卵开始隔离饲养的目的是______．

（4）菜青虫是危害十字花科蔬菜的重要害虫，人们利用人工合成______作引诱剂，干扰雌雄虫之间的______，阻止其交配，诱杀农业害虫．

50mL 1.0mol•L^-1盐酸跟50mL 1.1mol•L^-1氢氧化钠溶液在图1装置中进行中和反应，并通过测定反应过程中所放出的热量来计算中和热．试回答下列问题：

（1）大小烧杯间填满碎泡沫塑料的作用______．

（2）______（填“能”或“不能”）将环形玻璃搅拌棒改为环形铜棒．其原因是______．

（3）大烧杯上如不盖硬纸板，对求得中和热数值的影响是______（填“偏高”或“偏低”或“无影响”）．

（4）如果改用60mL 1.0mol•L^-1盐酸跟50mL 1.1mol•L^-1氢氧化钠溶液进行反应，则与上述实验相比，所放热量______（“增加”、“减少”或“不变”），所求中和热数值______（“增加”、“减少”或“不变”）

（5）某研究小组将装置完善后，把V₁ mL 1.0mol/L HCl溶液和V₂ mL未知浓度的NaOH溶液混合均匀后测量并记录溶液温度，实验结果如图2所示（实验中始终保持V₁+V₂=50mL）．回答下列问题：研究小组做该实验时环境温度______（填“高于”、“低于”或“等于”）22℃．

下列关于栈的叙述中，正确的是

A．栈顶元素一定是最先入栈的元素

B．栈操作遵循先进后出的原则

C．栈底元素一定是最后入栈的元素

D．以上三种说法都不对

不一定由检察机关立案侦查的是( )。

A．徇私枉法罪

B．非法拘禁罪

C．挪用公款罪

D．介绍贿赂罪

Young girls at high risk for depression appear to have a malfunctioning reward system in their brains, a new study suggests. The finding comes from research that (1) a high-risk group of 13 girls, aged 10 to 14, who were not depressed but had mothers who (2) recurrent depression and a low-risk group of 13 girls with no (3) or family history of depression. Both groups were given MRI brain (4) while completing a task that could (5) either reward or punishment.

(6) with girls in the low-risk group, those in the high-risk group had (7) neural responses during both anticipation and receipt of the reward. (8) , the high-risk girls showed no (9) in an area of the brain called the dorsal anterior cingulated cortex (背侧前扣带皮质), believed to play a role in (10) past experiences to assist learning.

The high-risk girls did have greater activation of this brain area (11) receiving punishment, compared with the other girls. The researchers said that this suggests that high-risk girls have easier time (12) information about loss and punishment than information about reward and pleasure.

"Considered together with reduced activation in the striatal (纹状体的) areas commonly observed (13) reward, it seems that the reward-processing system is critically (14) in daughters who are at elevated risk for depression, (15) they have not yet experienced a depressive (16) ," wrote Ian H. Gotlib, of Stanford University, and his colleagues. " (17) , longitudinal studies are needed to determine whether the anomalous activations (18) in this study during the processing of (19) and losses are associated with the (20) onset of depression," they concluded. The study was published in the April of the Archives of General Psychiatry.

18（）

A.carried

B.observed

C.effected

D.suffered