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There are many TV programs on Chinese cooking. However, few programs are like A Bite of China (舌尖上中国). It tries to bring something new by introducing more cultural features (特征) of dishes, such as eating habits and wonderful stories about小题1:f . It’s said that more than 100小题2: m Chinese people are watching the program. Most Chinese people see this program as more than just the regular food shows. They see it as an amazing documentary providing a special view of Chinese and the relations小题3: b people and food and between people and society. To get enough good stories, the production team 小题4:s three months doing research and interviews in about 60 cities before they started making the documentary. Filming lasted about nine months. Liu Wen, the director, said “As CCTV-9 serves as a window, allowing the world to better understand China, the documentary aims to help the world not only enjoy the beauty of Chinese cooking, but also 小题5:l about Chinese customs (风俗).”
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【单选题】已知在 CaF 2 ( K sp = 5.3 × 10 - 9 ) 与 CaSO 4 ( K sp = 9.1 × 10 - 6 ) 混合物的饱和溶液中, c (F - ) = 1.8 × 10 - 3 mol × L - 1 则 CaSO 4 的溶解度为 mol × L - 1 。
A.
3.0 × 10 -3
B.
5.7 × 10 -3
C.
1.6 × 10 -3
D.
9.0 × 10 -4
【单选题】在CaF 2 ( K sp =5.3×10 -9 )与CaSO 4 ( K sp =9.1×10 -6 )混合的饱和溶液中,测得F - 浓度为1.8×10 -3 mol·L -1 ,则溶液中SO 4 2- 的浓度为 mol·L -1 。
A.
3.0×10 -3
B.
5.7×10 -3
C.
1.6×10 -3
D.
9.0×10 -4
【单选题】What aspect of butterfly development does the professor mainly discuss?
A.
The way in which adults alter their lifecycle to reproduce.
B.
Their similarity to other holometabolic creatures.
C.
Their transformation from caterpillars into adult imagoes.
D.
The four specific phases they experience as they grow.
【单选题】已知CaF 2 的K sp = 5.3×10 -9 ,在氟离子浓度为3.0 的溶液中Ca 2+ 可能的最高浓度为( )
A.
1.8×10 -9
B.
1.8×10 -10
C.
5.9×10 -9
D.
5.9×10 -10
【单选题】CaF 2 的 K sp θ =5.3 × 10 -9 ,在氟离子浓度为 3.0mol.L -1 的溶液中 Ca 2+ 可能的最高浓度是( )。
A.
1.8 × 10 -9 mol.L -1
B.
5.9 × 10 -10 mol.L -1
C.
1.8 × 10 -10 mol.L -1
D.
5.9 × 10 -9 mol.L -1
【单选题】在 CaF 2 ( K sp =5.3×10 - 9 ) 与 CaSO 4 ( K sp =9.1×10 - 6 ) 混合的饱和溶液中 , 测得 F - 浓度为 1.8×10 - 3 mol/L , 则溶液中 SO 4 2 - 的浓度为 ( ) mol/L 。
A.
3.0×10^-3
B.
5.6×10^-3
C.
1.6×10^-3
D.
9.0×10^-4
【单选题】Which of he following is the way that a computer does its processing?
A.
Recognition and computation separately.
B.
Recognition and computation simultaneously.
C.
Computation followed by checking.
D.
Recognition, reasoning and then computation.
【单选题】在 CaF 2 ( K sp = 5.3 × 10 - 9 mol 3 ·L - 3 ) 与 CaSO 4 ( K sp = 9.1 × 10 - 6 mol 2 ·L - 2 ) 混合的饱和溶液中,测得 F - 浓度为 1.8 × 10 - 3 mol·L - 1 ,则溶液中 SO 的浓度为
A.
3.0 × 10 － 3 mol·L － 1
B.
5.7 × 10 － 3 mol·L － 1
C.
1.6 × 10 － 3 mol·L － 1
D.
9.0 × 10 － 4 mol·L － 1
【多选题】符合( )条件之一时，数台交流电动机可共用一套短路保护电器。
A.
总计算电流不超过20A，且允许无选择地切断时
B.
根据工艺要求，必须同时起停的一组电动机，不同时切断将危及人身设备安全时
C.
短路保护兼作接地故障保护时，应在每个不接地的相线上装设
D.
当只在两相上装设时，在有直接电气联系的同一网络中，保护器件应装设在相同的两相上
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