某药品原价是100元，经连续两次降价后，价格变为64元，如果每次降价的百分率是一

下面事件中确定事件是（　　）

A．今天下午刮风，则明天下雨

B．两条直线被第三条直线所截，则内错角相等

C．两个有理数的积为正数，则这两个数都是正数

D．抛掷一枚均匀的正六面体骰子，则点数不大于6

关于磁场方向下列说法正确的是（　　）

A．磁场方向就是小磁针南极的方向

B．磁场方向就是小磁针自然静止时北极所指的方向

C．磁场方向就是磁感线的方向

D．磁场方向就是某段电流所受安培力的方向

撒网式铺台方法多用于（）。

A、窄小的场地

B、技术比赛场合

C、咖啡厅

D、零点餐台

A good translator is by definition bilingual. The opposite is not ______(1) true, however. A born and bred bilingual will still need two__________(2) to become a translator: first, the skills and experience necessary for__________(3); second, knowledge of the field in which he or she will__________(4). The skills and experience for translation include the ability to write ______(5) in the target language, the ability to read and understand the_________(6) language material thoroughly, and the ability to work with the latest__________(7) and communication hardware and software.Does a born and bred bilingual__________(8) a better translator than someone who learned language B later in__________(9) There is no definite answer, but the following issues are important.__________(10), a born and bred bilingual often suffers from not truly knowing __________(11) language well enough to translate, with some even suffering from what __________(12) known as a lingualism, a state in which a person lacks_________(13) full, fluent command of any language. Second, born and bred bilinguals__________(14) don’’t know the culture of the target language well enough to_________(15) top-quality translations, or cannot recognize what aspects of the source language__________(16) its culture need to be treated with particular care, as they_________(17) in a sense too close to the language. And last, they often_________(18) the analytical linguistic skills to work through a sticky text.On_________(19) other hand, the acquired bilingual may not have the same in-depth _________(20) of colloquialisms, slang, and dialect that the born bilingual has. Also, the acquired bilingual will not be able to translate as readily in both directions (from B to language A and A to language B). Finally, born bilinguals often have a greater appreciation of the subtleties and nuances of both their languages than someone who learns their B language later in life can ever hope to have.

下列关于休眠卵，混交卵和非混交卵的描述，正确的是（）

A、休眠卵具有较厚的卵壳，大小比混交卵和非混交卵都大

B、休眠卵具有较厚的卵壳，大小比混交卵和非混交卵都小

C、混交卵具有较厚的卵壳，大小比休眠卵和非混交卵都小

D、非混交卵具有一气室，大小比休眠卵小，比混交卵都大