下列关于PCR技术应用的叙述，正确的是（ ）。
PCR技术可以检测细胞中基因的表达水平，但不能检测细胞中蛋白质的含量，故A错误。引物能与核酸特异性结合，因此在同一反应体系里加入多对特异性引物以同时检测多种病原微生物，故B正确。PCR技术可以用于检测细菌、病毒类疾病，故C正确。PCR技术可以对编码凝血因子Ⅷ的基因发生突变的位点进行检测，故D正确。
我国保护少年儿童权益的专项法律是《中华人民共和国未成年人保护法》。（ ）
根据以下材料，回答题
If you don′t think a phone is the rightgift for a lover, the smart choice this year is a smart phone.
For people who don′t read instructions
The easiest-to-use phone is the iPhone. It′sthat has pushed it to the No.1 selling position, surpassing the Motorola Razr.The iPhone′s touch screen is easy to operate and it′s also easy to customize (用户化). The iPhone can run allsorts of applications such as those help you to lose weight, identify a song onthe radio, find a restaurant or do many other things.
For the futurist
The T-Mobile G1 is very popular as it is thefirst phone to offer a Google browser, meaning that you′re getting the real webon your phone, but it′s the phone′s potential that qualifies it for the futurist.The exciting applications are interesting, but they don′t always work smoothly.Sometimes it is hard to use the applications it comes with. The system shouldimprove as it becomes more popular, so it holds great promise. With fewrestrictions on the design of applications for the phone,
the G1 could be the first phone toincorporate (整合) some of the coolest.
For the road warrior
The new BlackBerry Storm is something likethe equivalent (等同物) of a mullet--a business up front, party in the back. It stillincorporates the serious mail and organization features that have endeared (使受钟爱) these phones to business people. The 3.25-inch is bright anddetailed and it′s a decent size for watching videos on the go.
For the Luddite (反对技术进步的人)
For those who can′t handle buttons and newfeatures, there is the Samsung Jitterbug Dial. Some people are Luddites whojust want a few large buttons to make calls. That′s it, just calls. That makesit even easier to use an iPhone.
What would be the best title forthe passage (no more than 6 words)
________________________________________________________________________
简述学生的义务。
依据《普通高中英语课程标准》，语言有丰富的文化内涵。教师应根据学生的年龄特点和__________ ，逐步扩展文化知识的内容和范围。
（ ）提出了一个教师成长公式：经验+反思=成长。
（ ）、同龄人的交流、儿童的养育实践、教育与文化是影响儿童道德发展的主要因素。
恩格斯评论一位法国人是“德国革命原理的传播者，旧的封建社会的摧毁人”。恩格斯评论的是__________。
加涅认为复述不仅能有利于保持信息以便进行编码，也能增加短时记忆的容量。( )
聚合思维
一般而言，学习动机越强，学习效果越好。()
