Which function is what depiction of helix can't be separated from? A: Trigonometric function B: Logarithmic function C: Exponential function D: Power function

In the pipe flow, the cross-section velocity distribution of laminar flow conforms to （ ） A: Uniform law B: Law of linear change C: Parabolic law D: Law of logarithmic curve

There are 10Escherichia coliinoculated. Escherichia coli have a generation time of 20 minutes. After a lag of 20 minutes, the E.coli enter the logarithmic phase of growth. After 3 hours of growth, the total number of cells is A: 2560 B: 5120 C: 90 D: 1028 E: 1000000

There are 10 Escherichia coli inoculated. Escherichia coli have a generation time of 20 minutes. After a lag of 20 minutes, the E.coli enter the logarithmic phase of growth. After 3 hours of growth, the total number of cells is A: 2560 B: 5012 C: 90 D: 1028 E: 1000000