内部感觉包括（）。 A.运动觉 B.平衡觉 C.机体觉 D.皮肤觉

小红和小丽一共剪了16朵纸花，送给小朋友7朵。还剩多少朵花？

为比较Fe³⁺和Cu²⁺对H₂O₂分解的催化效果，某化学研究小组的同学分别设计了如图1、2所示的实验．请回答相关问题：

（1）定性分析：如图1可通过观察______，定性比较得出结论．有同学提出将FeCl₃改为Fe₂（SO₄）₃ 更为合理，其理由是______．

（2）定量分析：如图2所示，实验时均以生成40mL气体为准，其它可能影响实验的因素均已忽略．图中仪器A的名称为______，检查该装置气密性的方法是______，实验中需要测量的数据是______．

（3）加入0.10mol MnO₂粉末于50mL H₂O₂溶液中，在标准状况下放出气体的体积和时间的关系如图3所示．

①写出H₂O₂在二氧化锰作用下发生反应的化学方程式______．

②实验时放出气体的总体积是______mL．

③放出

1

3

气体所需时间为______ min．

④反应放出

3

4

气体所需时间约为______ min．

⑤A、B、C、D各点反应速率快慢的顺序为______＞______＞______＞______．

⑥解释反应速率变化的原因______．

⑦计算H₂O₂的初始物质的量浓度______．（请保留两位有效数字）

小学儿童的社会性发展突出表现在( )。

A．社会性认知

B．社会性情感

C．社会性行为

D．社会性交往

番茄病毒病有哪几种？传播方式有何不同？怎么防治？

Tony Calaveccio, CFA, is the manager of the TrustCo Small Cap Venture Fund in Toronto. He places trades for the fund with Worldwide Brokerage. Worldwide is holding a conference in Amsterdam and has offered to pay for Calaveccio’s airfare, meals, and accommodations associated with his attendance of the conference. The conference concerns European small cap securities and the EASDAQ. He decides that he will accept their offer and attend the conference. In order to comply with the Code and Standards, he may:（）

A. attend, but he must disclose the arrangement to his employer as a gift.

B. simply attend. Since the conference is directly related to his professional responsibilities, no further notification or permission is required.

C. attend, but he must disclose the arrangement as additional compensation to his employer in writing.