单项选择题
Who worked on improving the microscope and came up with a description of bacteria?
A、Anton Van Leeuwenhoek
B、Louis Pasteur
C、Edward Jenner
D、Robert Koch
Who worked on improving the microscope and came up with a description of bacteria?
A、Anton Van Leeuwenhoek
B、Louis Pasteur
C、Edward Jenner
D、Robert Koch