A healthy 32-year-old man lifts weights regularly as part of his work-out. In one of his biceps muscle fibers at rest, the length of the I bandis 1.0 μm and the A band is 1.5 μm. Contraction of that muscle fiberresults in a 10% shortening of the length of the sarcomere. What isthe length of the A band after the shortening produced by musclecontraction?
A: 1.50 μm
B: 1.35 μm
C: 1.00 μm
D: 1.90 μm
E: 0.45 μm
A: 1.50 μm
B: 1.35 μm
C: 1.00 μm
D: 1.90 μm
E: 0.45 μm
举一反三
- 求[2，1000]素数的个数，可以使用的命令有（）。 A: m=2:1000; p=isprime(m); sum(p) B: p=primes(1000); length(p) C: m=2:1000; p=m(isprime(m)); length(p) D: m=2:1000; p=find(isprime(m)); length(p)
- 1. Charges of 3.00 nC, –2.00 nC, –7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, width 2.00 m, and height 2.50 m. Outside the box are charges of 1.00 nC and 4.00 nC. What is the electric flux through the surface of the box?
- 除菌滤膜的最大孔径为（） A: 0.10μm B: 0.22μm C: 0.45μm D: 1.45μm E: 1.00μm
- 进行悬浮物固体含量分析时，采用的滤膜孔径为（）。 A: 0.45μm B: 0.5μm C: 1.0μm D: 1.5μm
- The sound of a band is rated as 50 dB at a distance of 30.0 m. What is the dB sound level of the band when one is 10.0 m from the band? A: 59.5 dB B: 57.3 dB C: 55.2 dB D: 52.9 dB E: 50.1 dB