炉箅子（lú bì zi）

Sea turtles migrate across thousands of miles of ocean before returning to nest on the same stretch of coastline where they hatched, but how they do this has mystified scientists for more than fifty years. Sea turtles likely go to great lengths to find the places where they began life because successful nesting requires a combination of environmental features that are rare: soft sand, the right temperature, few predators, and an easily accessible beach. From this passage it is safe to conclude that sea turtles

A、are not easily observed by scientists.

B、cannot lay their eggs on any beach other than the one on which they hatched.

C、will not lay their eggs on beaches with pebbly sand.

D、must have the ability to precisely detect their location.

A、CO2(g)

B、H2O(l)

C、I2(s)

D、N2(l)

B、线刚度

C、惯性半径

D、惯性直径J

在海水中c（Cl^-）≈10^-5mol/L，c（I^-）≈2.2′10^-13mol/L，此时加入AgNO₃试剂问（）先沉淀，已知：Ksp（AgCl）=1.8′10^-10，Ksp（AgI）=8.3′10^-17

A. Cl^-

B. I^-

C. 同时沉淀

D. 不发生沉淀

图示互感电路中已知M、L1、L2和i1、i2，则u2= （ ）

A、

B、

C、

D、

图示互感电路中已知M、L1、L2和i1、i2，则u2= （ ）

A、

B、

C、

D、

当输入为I7_L...I0_L:0010 0010 时，输出为A2A1A0=（ ），这里的A2A1A0是指片外的A2A1A0。

当输入为I7_l...I0_l:0010 0010 时，输出为A2A1A0=（ ）