______a lot of cash in recent years, physicists and astronomers are now finding they do no
A.Spending
B.Having spent
C.Spent
D.To spend
A.Spending
B.Having spent
C.Spent
D.To spend
A.正确
B.错误
A、are illegal in some company
B、will be converted to cash within two years
C、will be converted to cash within 90 days
D、will be converted to cash within 120 days
B.the incoming cash and outgoing cash
C.he assets purchased with cash contributed by the owner and the cash spent to operate the business
D.the amounts received from customers for goods or services and the amounts paid for the s used to provide the goods or services
B.the incoming cash and outgoing cash
C.he assets purchased with cash contributed by the owner and the cash spent to operate the business
D.the amounts received from customers for goods or services and the amounts paid for the inputs used to provide the goods or services
A.正确
B.错误